// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://code.google.com/p/protobuf/
//
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package com.google.protobuf;

/**
 * Blocking equivalent to {@link Service}.
 *
 * @author kenton@google.com Kenton Varda
 * @author cpovirk@google.com Chris Povirk
 */
public interface BlockingService {
  /**
   * Equivalent to {@link Service#getDescriptorForType}.
   */
  Descriptors.ServiceDescriptor getDescriptorForType();

  /**
   * Equivalent to {@link Service#callMethod}, except that
   * {@code callBlockingMethod()} returns the result of the RPC or throws a
   * {@link ServiceException} if there is a failure, rather than passing the
   * information to a callback.
   */
  Message callBlockingMethod(Descriptors.MethodDescriptor method,
                             RpcController controller,
                             Message request) throws ServiceException;

  /**
   * Equivalent to {@link Service#getRequestPrototype}.
   */
  Message getRequestPrototype(Descriptors.MethodDescriptor method);

  /**
   * Equivalent to {@link Service#getResponsePrototype}.
   */
  Message getResponsePrototype(Descriptors.MethodDescriptor method);
}
